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List of contexts inside reports submitted by BUTLER NATIONAL CORP

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Report: bulks-20120430.xml or XBRLViewer

  1. Date: As of Jul 6, 2012
  2. Date: As of Apr 30, 2012
  3. Date: From May 1, 2011 to Apr 30, 2012
  4. Date: As of Oct 31, 2011
  5. Date: As of Apr 30, 2011
  6. Date: From May 1, 2010 to Apr 30, 2011
  7. Date: From May 1, 2009 to Apr 30, 2010
  8. Date: As of Apr 30, 2010
  9. Date: As of Apr 30, 2009

Report: bulks-20120131.xml or XBRLViewer

  1. Date: As of Mar 2, 2012
  2. Date: From May 1, 2011 to Jan 31, 2012
  3. Date: As of Jan 31, 2012
  4. Date: As of Jul 22, 2011
  5. Date: As of Apr 30, 2011
  6. Date: From Nov 1, 2010 to Jan 31, 2011
  7. Date: As of Jan 31, 2011
  8. Date: As of Apr 30, 2010

Report: buks-20190731.xml or XBRLViewer

  1. Date: As of Sep 6, 2019
  2. Date: As of Jul 31, 2019
  3. Date: From May 1, 2019 to Jul 31, 2019
  4. Date: From May 1, 2018 to Apr 30, 2019
  5. Date: As of Apr 30, 2019
  6. Date: As of Apr 12, 2019
  7. Date: From Apr 12, 2019 to Apr 12, 2019
  8. Date: As of Apr 1, 2019
  9. Date: As of Jan 31, 2019
  10. Date: From Nov 1, 2018 to Jan 31, 2019
  11. Date: From Aug 1, 2018 to Oct 31, 2018
  12. Date: As of Oct 31, 2018
  13. Date: From May 1, 2018 to Jul 31, 2018
  14. Date: As of Jul 31, 2018
  15. Date: As of Apr 30, 2018
  16. Date: From Apr 1, 2018 to Apr 30, 2018
  17. Date: As of Apr 1, 2018
  18. Date: From Nov 1, 2017 to Jan 31, 2018
  19. Date: As of Jan 31, 2018
  20. Date: As of Oct 31, 2017
  21. Date: From Aug 1, 2017 to Oct 31, 2017
  22. Date: From May 1, 2016 to Jul 31, 2017
  23. Date: As of Jul 31, 2017
  24. Date: As of Dec 31, 2016
  25. Date: As of Nov 30, 2016

Report: buks-20190430.xml or XBRLViewer

  1. Date: As of Jul 12, 2019
  2. Date: As of Jun 30, 2019
  3. Date: From May 1, 2019 to May 30, 2019
  4. Date: As of Apr 30, 2019
  5. Date: From May 1, 2018 to Apr 30, 2019
  6. Date: From Apr 12, 2019 to Apr 12, 2019
  7. Date: As of Apr 12, 2019
  8. Date: As of Apr 1, 2019
  9. Date: From Nov 1, 2018 to Jan 31, 2019
  10. Date: As of Jan 31, 2019
  11. Date: From Aug 1, 2018 to Oct 31, 2018
  12. Date: As of Oct 31, 2018
  13. Date: As of Jul 31, 2018
  14. Date: From May 1, 2018 to Jul 31, 2018
  15. Date: From May 1, 2017 to Apr 30, 2018
  16. Date: As of Apr 30, 2018
  17. Date: As of Apr 1, 2018
  18. Date: From Nov 1, 2017 to Jan 31, 2018
  19. Date: As of Jan 31, 2018
  20. Date: As of Oct 31, 2017
  21. Date: From Aug 1, 2017 to Oct 31, 2017
  22. Date: From May 1, 2017 to Jul 31, 2017
  23. Date: As of Jul 31, 2017
  24. Date: As of Apr 30, 2017
  25. Date: From May 1, 2016 to Apr 30, 2017
  26. Date: As of Dec 31, 2016
  27. Date: As of Nov 30, 2016

Report: buks-20190131.xml or XBRLViewer

  1. Date: As of Mar 15, 2019
  2. Date: As of Feb 28, 2019
  3. Date: From Feb 1, 2019 to Feb 28, 2019
  4. Date: As of Jan 31, 2019
  5. Date: From May 1, 2018 to Jan 31, 2019
  6. Date: From Aug 1, 2018 to Oct 31, 2018
  7. Date: As of Oct 31, 2018
  8. Date: As of Jul 31, 2018
  9. Date: From May 1, 2018 to Jul 31, 2018
  10. Date: As of Apr 30, 2018
  11. Date: From May 1, 2017 to Apr 30, 2018
  12. Date: From May 1, 2017 to Jan 31, 2018
  13. Date: As of Jan 31, 2018
  14. Date: As of Oct 31, 2017
  15. Date: From Aug 1, 2017 to Oct 31, 2017
  16. Date: From May 1, 2017 to Jul 31, 2017
  17. Date: As of Jul 31, 2017
  18. Date: As of Apr 30, 2017
  19. Date: From Feb 1, 2017 to Apr 30, 2017
  20. Date: From Nov 1, 2016 to Jan 31, 2017
  21. Date: As of Jan 31, 2017
  22. Date: As of Dec 31, 2016
  23. Date: As of Nov 30, 2016
  24. Date: From Nov 1, 2016 to Nov 30, 2016

Report: buks-20181031.xml or XBRLViewer

  1. Date: As of Dec 14, 2018
  2. Date: From Nov 1, 2018 to Nov 30, 2018
  3. Date: As of Oct 31, 2018
  4. Date: From May 1, 2018 to Oct 31, 2018
  5. Date: As of Jul 31, 2018
  6. Date: From May 1, 2018 to Jul 31, 2018
  7. Date: As of Apr 30, 2018
  8. Date: From May 1, 2017 to Apr 30, 2018
  9. Date: From Nov 1, 2017 to Jan 31, 2018
  10. Date: As of Jan 31, 2018
  11. Date: As of Oct 31, 2017
  12. Date: From May 1, 2017 to Oct 31, 2017
  13. Date: From May 1, 2017 to Jul 31, 2017
  14. Date: As of Jul 31, 2017
  15. Date: As of Apr 30, 2017
  16. Date: From Feb 1, 2017 to Apr 30, 2017
  17. Date: From Nov 1, 2016 to Jan 31, 2017
  18. Date: As of Jan 31, 2017
  19. Date: As of Dec 31, 2016
  20. Date: As of Nov 30, 2016

Report: buks-20180731.xml or XBRLViewer

  1. Date: As of Sep 7, 2018
  2. Date: From Aug 1, 2018 to Aug 31, 2018
  3. Date: From Nov 1, 2016 to Jul 31, 2018
  4. Date: As of Jul 31, 2018
  5. Date: From May 1, 2018 to Jul 30, 2018
  6. Date: As of Jul 30, 2018
  7. Date: From Feb 1, 2018 to Apr 30, 2018
  8. Date: As of Apr 30, 2018
  9. Date: From Nov 1, 2017 to Jan 31, 2018
  10. Date: As of Jan 31, 2018
  11. Date: As of Oct 31, 2017
  12. Date: From Aug 1, 2017 to Oct 31, 2017
  13. Date: From May 1, 2017 to Jul 31, 2017
  14. Date: As of Jul 31, 2017
  15. Date: As of Apr 30, 2017
  16. Date: From Feb 1, 2017 to Apr 30, 2017
  17. Date: From Nov 1, 2016 to Jan 31, 2017
  18. Date: As of Jan 31, 2017
  19. Date: As of Dec 31, 2016
  20. Date: As of Nov 30, 2016

Report: buks-20180430.xml or XBRLViewer

  1. Date: As of Jul 13, 2018
  2. Date: As of Apr 30, 2018
  3. Date: From May 1, 2017 to Apr 30, 2018
  4. Date: From Nov 1, 2017 to Jan 31, 2018
  5. Date: As of Jan 31, 2018
  6. Date: As of Oct 31, 2017
  7. Date: From Aug 1, 2017 to Oct 31, 2017
  8. Date: From May 1, 2017 to Jul 31, 2017
  9. Date: As of Jul 31, 2017
  10. Date: As of Apr 30, 2017
  11. Date: From May 1, 2016 to Apr 30, 2017
  12. Date: From Nov 1, 2016 to Jan 31, 2017
  13. Date: As of Jan 31, 2017
  14. Date: As of Dec 31, 2016
  15. Date: As of Nov 30, 2016
  16. Date: As of Apr 30, 2016

Report: buks-20180131.xml or XBRLViewer

  1. Date: As of Mar 9, 2018
  2. Date: As of Jan 31, 2018
  3. Date: From May 1, 2017 to Jan 31, 2018
  4. Date: As of Oct 31, 2017
  5. Date: From Aug 1, 2017 to Oct 31, 2017
  6. Date: From May 1, 2017 to Jul 31, 2017
  7. Date: As of Jul 31, 2017
  8. Date: As of Apr 30, 2017
  9. Date: From Feb 1, 2017 to Apr 30, 2017
  10. Date: From Nov 1, 2016 to Jan 31, 2017
  11. Date: As of Jan 31, 2017
  12. Date: As of Dec 31, 2016
  13. Date: As of Nov 30, 2016
  14. Date: As of Apr 30, 2016

Report: buks-20171031.xml or XBRLViewer

  1. Date: As of Dec 8, 2017
  2. Date: As of Oct 31, 2017
  3. Date: From May 1, 2017 to Oct 31, 2017
  4. Date: From May 1, 2017 to Jul 31, 2017
  5. Date: As of Jul 31, 2017
  6. Date: As of Apr 30, 2017
  7. Date: From Feb 1, 2017 to Apr 30, 2017
  8. Date: From Nov 1, 2016 to Jan 31, 2017
  9. Date: As of Jan 31, 2017
  10. Date: As of Dec 31, 2016
  11. Date: As of Nov 30, 2016
  12. Date: As of Oct 31, 2016
  13. Date: From May 1, 2016 to Oct 31, 2016
  14. Date: As of Apr 30, 2016

Report: buks-20170731.xml or XBRLViewer

  1. Date: As of Sep 8, 2017
  2. Date: As of Jul 31, 2017
  3. Date: From May 1, 2017 to Jul 31, 2017
  4. Date: As of Apr 30, 2017
  5. Date: From Feb 1, 2017 to Apr 30, 2017
  6. Date: From Nov 1, 2016 to Jan 31, 2017
  7. Date: As of Jan 31, 2017
  8. Date: As of Dec 31, 2016
  9. Date: From Dec 1, 2016 to Dec 31, 2016
  10. Date: As of Nov 30, 2016
  11. Date: As of Jul 31, 2016
  12. Date: From May 1, 2016 to Jul 31, 2016
  13. Date: As of Apr 30, 2016

Report: buks-20170430.xml or XBRLViewer

  1. Date: As of Jul 14, 2017
  2. Date: As of Apr 30, 2017
  3. Date: From May 1, 2016 to Apr 30, 2017
  4. Date: As of Jan 31, 2017
  5. Date: From Jan 1, 2017 to Jan 31, 2017
  6. Date: From Dec 1, 2016 to Dec 31, 2016
  7. Date: As of Dec 31, 2016
  8. Date: As of Nov 30, 2016
  9. Date: As of Oct 31, 2016
  10. Date: From May 1, 2015 to Apr 30, 2016
  11. Date: As of Apr 30, 2016
  12. Date: As of Apr 30, 2015
  13. Date: From Dec 31, 2010 to Dec 31, 2010

Report: buks-20170131.xml or XBRLViewer

  1. Date: As of Mar 3, 2017
  2. Date: As of Jan 31, 2017
  3. Date: From Nov 1, 2016 to Jan 31, 2017
  4. Date: From May 1, 2015 to Apr 30, 2016
  5. Date: As of Apr 30, 2016
  6. Date: From May 1, 2015 to Jan 31, 2016
  7. Date: As of Jan 31, 2016
  8. Date: As of Apr 30, 2015
  9. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20161031.xml or XBRLViewer

  1. Date: As of Dec 9, 2016
  2. Date: As of Oct 31, 2016
  3. Date: From May 1, 2016 to Oct 31, 2016
  4. Date: From May 1, 2015 to Apr 30, 2016
  5. Date: As of Apr 30, 2016
  6. Date: As of Oct 31, 2015
  7. Date: From May 1, 2015 to Oct 31, 2015
  8. Date: As of Apr 30, 2015
  9. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20160731.xml or XBRLViewer

  1. Date: As of Sep 9, 2016
  2. Date: As of Jul 31, 2016
  3. Date: From May 1, 2016 to Jul 31, 2016
  4. Date: From May 1, 2015 to Apr 30, 2016
  5. Date: As of Apr 30, 2016
  6. Date: As of Jul 31, 2015
  7. Date: From May 1, 2015 to Jul 31, 2015
  8. Date: As of Apr 30, 2015
  9. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20160430.xml or XBRLViewer

  1. Date: As of Jul 1, 2016
  2. Date: From May 1, 2015 to Apr 30, 2016
  3. Date: As of Apr 30, 2016
  4. Date: From Nov 1, 2015 to Jan 31, 2016
  5. Date: From Aug 1, 2015 to Oct 31, 2015
  6. Date: From May 1, 2015 to Jul 31, 2015
  7. Date: As of Apr 30, 2015
  8. Date: From May 1, 2014 to Apr 30, 2015
  9. Date: From Feb 1, 2015 to Feb 28, 2015
  10. Date: As of Feb 28, 2015
  11. Date: From Nov 1, 2014 to Jan 31, 2015
  12. Date: From Aug 1, 2014 to Oct 31, 2014
  13. Date: From May 1, 2014 to Jul 31, 2014
  14. Date: As of Apr 30, 2014
  15. Date: From May 1, 2013 to Apr 30, 2014
  16. Date: From Mar 1, 2014 to Mar 31, 2014
  17. Date: As of Apr 30, 2013

Report: buks-20160131.xml or XBRLViewer

  1. Date: From May 1, 2015 to Jan 31, 2016
  2. Date: As of Jan 31, 2016
  3. Date: From May 1, 2015 to Oct 31, 2015
  4. Date: As of Apr 30, 2015
  5. Date: From May 1, 2014 to Apr 30, 2015
  6. Date: As of Feb 2, 2015
  7. Date: As of Jan 31, 2015
  8. Date: From Nov 1, 2014 to Jan 31, 2015
  9. Date: As of Apr 30, 2014
  10. Date: As of Mar 7, 2014
  11. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20151031.xml or XBRLViewer

  1. Date: As of Oct 31, 2015
  2. Date: From May 1, 2015 to Oct 31, 2015
  3. Date: From May 1, 2014 to Apr 30, 2015
  4. Date: As of Apr 30, 2015
  5. Date: As of Feb 2, 2015
  6. Date: From May 1, 2014 to Oct 31, 2014
  7. Date: As of Oct 31, 2014
  8. Date: As of Apr 30, 2014
  9. Date: As of Mar 7, 2014
  10. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20150731.xml or XBRLViewer

  1. Date: As of Jul 31, 2015
  2. Date: From May 1, 2015 to Jul 31, 2015
  3. Date: From May 1, 2014 to Apr 30, 2015
  4. Date: As of Apr 30, 2015
  5. Date: As of Feb 2, 2015
  6. Date: From May 1, 2014 to Jul 31, 2014
  7. Date: As of Jul 31, 2014
  8. Date: As of Apr 30, 2014
  9. Date: As of Mar 7, 2014
  10. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20150430.xml or XBRLViewer

  1. Date: As of Jul 5, 2015
  2. Date: From May 1, 2014 to Apr 30, 2015
  3. Date: As of Apr 30, 2015
  4. Date: From Nov 1, 2014 to Jan 31, 2015
  5. Date: From Aug 1, 2014 to Oct 31, 2014
  6. Date: From May 1, 2014 to Jul 31, 2014
  7. Date: As of Apr 30, 2014
  8. Date: From May 1, 2013 to Apr 30, 2014
  9. Date: From Nov 1, 2013 to Jan 31, 2014
  10. Date: From Aug 1, 2013 to Oct 31, 2013
  11. Date: From May 1, 2013 to Jul 31, 2013
  12. Date: As of Apr 30, 2013
  13. Date: From May 1, 2012 to Apr 30, 2013
  14. Date: From Nov 1, 2012 to Jan 31, 2013
  15. Date: From Aug 1, 2012 to Oct 31, 2012
  16. Date: From May 1, 2012 to Jul 31, 2012
  17. Date: As of Apr 30, 2012
  18. Date: From May 1, 2011 to Apr 30, 2012
  19. Date: As of Sep 1, 2010
  20. Date: From May 1, 2009 to Apr 30, 2010
  21. Date: As of Apr 30, 2010
  22. Date: As of Jun 30, 2009

Report: buks-20150131.xml or XBRLViewer

  1. Date: As of Mar 6, 2015
  2. Date: As of Feb 2, 2015
  3. Date: From May 1, 2014 to Jan 31, 2015
  4. Date: As of Jan 31, 2015
  5. Date: As of Jul 31, 2014
  6. Date: From May 1, 2014 to Jul 31, 2014
  7. Date: As of Apr 30, 2014
  8. Date: From Feb 1, 2014 to Apr 30, 2014
  9. Date: As of Mar 7, 2014
  10. Date: From May 1, 2013 to Jan 31, 2014
  11. Date: As of Jan 31, 2014
  12. Date: From May 1, 2013 to Jul 31, 2013
  13. Date: As of Apr 30, 2013
  14. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20141031.xml or XBRLViewer

  1. Date: As of Dec 5, 2014
  2. Date: As of Oct 31, 2014
  3. Date: From May 1, 2014 to Oct 31, 2014
  4. Date: As of Jul 31, 2014
  5. Date: From May 1, 2014 to Jul 31, 2014
  6. Date: As of Apr 30, 2014
  7. Date: From Feb 1, 2014 to Apr 30, 2014
  8. Date: As of Mar 7, 2014
  9. Date: From May 1, 2013 to Oct 31, 2013
  10. Date: As of Oct 31, 2013
  11. Date: From May 1, 2013 to Jul 31, 2013
  12. Date: As of Apr 30, 2013
  13. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20140731.xml or XBRLViewer

  1. Date: As of Sep 5, 2014
  2. Date: As of Jul 31, 2014
  3. Date: From May 1, 2014 to Jul 31, 2014
  4. Date: As of Apr 30, 2014
  5. Date: From Feb 1, 2014 to Apr 30, 2014
  6. Date: As of Mar 7, 2014
  7. Date: From May 1, 2013 to Jul 31, 2013
  8. Date: As of Jul 31, 2013
  9. Date: As of Apr 30, 2013
  10. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20140430.xml or XBRLViewer

  1. Date: As of Jul 4, 2014
  2. Date: From May 1, 2013 to Apr 30, 2014
  3. Date: As of Apr 30, 2014
  4. Date: From Nov 1, 2013 to Jan 31, 2014
  5. Date: From Aug 1, 2013 to Oct 31, 2013
  6. Date: From May 1, 2013 to Jul 31, 2013
  7. Date: As of Jul 5, 2013
  8. Date: As of Apr 30, 2013
  9. Date: From May 1, 2012 to Apr 30, 2013
  10. Date: From Nov 1, 2012 to Jan 31, 2013
  11. Date: From Aug 1, 2012 to Oct 31, 2012
  12. Date: From May 1, 2012 to Jul 31, 2012
  13. Date: As of May 8, 2012
  14. Date: From May 1, 2011 to Apr 30, 2012
  15. Date: As of Apr 30, 2012
  16. Date: From Nov 1, 2011 to Jan 31, 2012
  17. Date: From Aug 1, 2011 to Oct 31, 2011
  18. Date: As of Jul 31, 2011
  19. Date: From May 1, 2011 to Jul 31, 2011
  20. Date: As of Apr 30, 2011
  21. Date: As of Sep 1, 2010
  22. Date: As of Apr 30, 2010
  23. Date: From May 1, 2009 to Apr 30, 2010
  24. Date: As of Jun 30, 2009

Report: buks-20140131.xml or XBRLViewer

  1. Date: As of Mar 7, 2014
  2. Date: As of Jan 31, 2014
  3. Date: From May 1, 2013 to Jan 31, 2014
  4. Date: As of Oct 31, 2013
  5. Date: As of Jul 31, 2013
  6. Date: As of Apr 30, 2013
  7. Date: From May 1, 2012 to Jan 31, 2013
  8. Date: As of Jan 31, 2013
  9. Date: As of Oct 31, 2012
  10. Date: From Aug 1, 2012 to Aug 24, 2012
  11. Date: From May 1, 2012 to Jul 31, 2012
  12. Date: As of May 8, 2012
  13. Date: As of Apr 30, 2012
  14. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20140131.xml or XBRLViewer

  1. Date: As of Mar 7, 2014
  2. Date: As of Jan 31, 2014
  3. Date: From Nov 1, 2013 to Jan 31, 2014
  4. Date: As of Oct 31, 2013
  5. Date: As of Jul 31, 2013
  6. Date: As of Apr 30, 2013
  7. Date: As of Jan 31, 2013
  8. Date: From Nov 1, 2012 to Jan 31, 2013
  9. Date: As of Oct 31, 2012
  10. Date: From Aug 1, 2012 to Aug 24, 2012
  11. Date: From May 1, 2012 to Jul 31, 2012
  12. Date: As of May 8, 2012
  13. Date: As of Apr 30, 2012
  14. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20131031.xml or XBRLViewer

  1. Date: From May 1, 2013 to Oct 31, 2013
  2. Date: As of Oct 31, 2013
  3. Date: As of Sep 6, 2013
  4. Date: As of Jul 31, 2013
  5. Date: As of Apr 30, 2013
  6. Date: From May 1, 2012 to Oct 31, 2012
  7. Date: From Aug 1, 2012 to Aug 24, 2012
  8. Date: From May 1, 2012 to Jul 31, 2012
  9. Date: As of Jul 31, 2012
  10. Date: As of May 8, 2012
  11. Date: From May 1, 2011 to Apr 30, 2012
  12. Date: As of Apr 30, 2012
  13. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20130731.xml or XBRLViewer

  1. Date: As of Sep 6, 2013
  2. Date: As of Jul 31, 2013
  3. Date: From May 1, 2013 to Jul 31, 2013
  4. Date: As of Apr 30, 2013
  5. Date: From Aug 1, 2012 to Aug 24, 2012
  6. Date: As of Jul 31, 2012
  7. Date: From May 1, 2012 to Jul 31, 2012
  8. Date: As of May 8, 2012
  9. Date: From May 1, 2011 to Apr 30, 2012
  10. Date: As of Apr 30, 2012
  11. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20130430.xml or XBRLViewer

  1. Date: From Nov 1, 2013 to Jan 31, 2014
  2. Date: As of Jul 5, 2013
  3. Date: As of Apr 30, 2013
  4. Date: From May 1, 2012 to Apr 30, 2013
  5. Date: From Aug 1, 2012 to Oct 31, 2012
  6. Date: As of Oct 31, 2012
  7. Date: From May 1, 2012 to Jul 31, 2012
  8. Date: As of Apr 30, 2012
  9. Date: From Feb 1, 2012 to Apr 30, 2012
  10. Date: From Nov 1, 2011 to Jan 31, 2012
  11. Date: From Aug 1, 2011 to Oct 31, 2011
  12. Date: From May 1, 2011 to Jul 31, 2011
  13. Date: From May 1, 2010 to Apr 30, 2011
  14. Date: As of Apr 30, 2011
  15. Date: From Nov 1, 2010 to Jan 31, 2011
  16. Date: From Aug 1, 2010 to Oct 31, 2010
  17. Date: As of Sep 1, 2010
  18. Date: From May 1, 2010 to Jul 31, 2010
  19. Date: As of Apr 30, 2010
  20. Date: From May 1, 2009 to Apr 30, 2010
  21. Date: As of Jun 30, 2009

Report: buks-20130131.xml or XBRLViewer

  1. Date: As of Mar 8, 2013
  2. Date: As of Jan 31, 2013
  3. Date: From May 1, 2012 to Jan 31, 2013
  4. Date: From Aug 1, 2012 to Aug 24, 2012
  5. Date: As of May 8, 2012
  6. Date: From May 1, 2011 to Apr 30, 2012
  7. Date: As of Apr 30, 2012
  8. Date: From May 1, 2011 to Jan 31, 2012
  9. Date: As of Jan 31, 2012
  10. Date: As of Apr 30, 2011
  11. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20121031.xml or XBRLViewer

  1. Date: As of Dec 3, 2012
  2. Date: From Aug 1, 2012 to Oct 31, 2012
  3. Date: As of Oct 31, 2012
  4. Date: From Jul 25, 2012 to Aug 24, 2012
  5. Date: As of May 8, 2012
  6. Date: As of Apr 30, 2012
  7. Date: From May 1, 2011 to Apr 30, 2012
  8. Date: From Aug 1, 2011 to Oct 31, 2011
  9. Date: As of Oct 31, 2011
  10. Date: As of Apr 30, 2011
  11. Date: From Dec 1, 2010 to Dec 31, 2010

Report: buks-20120731.xml or XBRLViewer

  1. Date: As of Sep 3, 2012
  2. Date: From Aug 1, 2012 to Aug 24, 2012
  3. Date: From May 1, 2012 to Jul 31, 2012
  4. Date: As of Jul 31, 2012
  5. Date: As of May 8, 2012
  6. Date: From Feb 1, 2012 to Apr 30, 2012
  7. Date: As of Apr 30, 2012
  8. Date: From May 1, 2011 to Jul 31, 2011
  9. Date: As of Jul 31, 2011
  10. Date: As of Apr 30, 2011
  11. Date: From Nov 30, 2010 to Dec 31, 2010

Report: buks-20111031.xml or XBRLViewer

  1. Date: As of Dec 2, 2011
  2. Date: From Aug 1, 2011 to Oct 31, 2011
  3. Date: As of Oct 31, 2011
  4. Date: As of Jul 22, 2011
  5. Date: As of Apr 30, 2011
  6. Date: From Aug 1, 2010 to Oct 31, 2010
  7. Date: As of Oct 31, 2010
  8. Date: As of Apr 30, 2010

Report: buks-20110731.xml or XBRLViewer

  1. Date: As of Sep 2, 2011
  2. Date: As of Jul 31, 2011
  3. Date: From May 1, 2011 to Jul 31, 2011
  4. Date: As of Jul 22, 2011
  5. Date: As of Apr 30, 2011
  6. Date: From May 1, 2010 to Jul 31, 2010
  7. Date: As of Jul 31, 2010
  8. Date: As of Apr 30, 2010